Undercut-saw guide.



C. DEVERELL.

UNDERGUT SAW GUIDE.

APPLIOATIAONHLBD 110.16, 1913.

1,()96,693.A Patented May 12, 1914 2 SHEETS-SHEET 1.

WITNESSES l/VVE/VTR C. DEVERELL.

UNDEROUT SAW GUIDE.

APPLICATION FILED AUG. 1-5, 1913.

1,096,693. Patented May 12, 1914.

By m

' mom/frs UNITED STATES PATENT OEECE.

CHARLES DEVERELL, OE PORTLAND, OREGON.

UNDERCUT-SAW GUIDE.

To all 107mm, t may concern Re it known that I, CHARLES DevnRnLL, a citizen of the United States, and a resident of Portland, in the county of Multnomah and State ot' Oregon, have invented a new and improved Undercut- Saw Guide, of which the following is a full, clear, and exact description.

My invention relates to a device for supporting a crosscut saw for making kerfs on the underside o1 a log with the saw inverted.

The design of my'invention is to provide a device o'E the indicated character which will possess more strength and simplicity than devices ordinarily employed, and which will not involve the employment of devices likely to become broken or disarranged.

The invention will be particularly explained in the specilic description following.

Reference is to be had to the accompanying drawings forming a part of this specilication in which like characters of reference indicate corresponding parts in all the views, and in which- Figure 1 is a side elevation ol an undercut saw guide embodying my invention, showing the same in position, for use, the view indicating a log and a crosscut saw; Fig'. 2 is a side elevation of my device on a larger scale; Fig. 3 is a view taken at right angles to Fig. 2, parts being in section;Y

Fig. 4 is an elevation from the opposite side of the view shown in Fig. 2, and showing the saw supporting wheel in different position; Fig. 5 is a cross section through the shank of the device above the saw supporting wheel; and Fig. 6 is a cross section taken` through the lower end of the shank below the saw supporting wheel.

In making a device in accordance with my invention a head 10 is provided having one or more prongs or spikes 11 projecting laterally from one side of the head and adapted to be driven into a log A. Depending from the head 10 is an elongated vertical shank 12 on which is fitted to slide a sleeve 13 carrying a wheel 14 peripherally grooved as usual in such devices to support the saw B in inverted position below the log A.

Provision is made for holding the sleeve 123 at different elevations on the shank 12, and to this end co-acting means are provided on the sleeve and shank. The said means in the present instance comprises two Specification of Letters Patent.

Application filed August 15, 1913.

Pateliltedllay 12, 1914;.

serial No. 784,913.

diametrieally opposite vertical series of notches 15 on the shank, and a spring dog 11S is carried by the sleeve, the dog having a pin 17 adapted to engage in any one of the notches The shank :for the greater portion oit its length is square or otherwise made non-circular in cross section, and the bore 13a of the sleeve 13 is correspondingly formed to prevent turning of the sleeve on the shank.

The saw supporting wheel 14. is mounted on a stud axle 18 formed on the lateral member of an L-shaped har 19 which is fitted in a sleeve for limited vertical movement. The said har has guided movement in alined holes in vertically spaced lateral lugs 20, and between said lugs a spiral spring surrounds the bar 19, there being a transverse pin 22 engaging the spring. The arrangement is such that with the back of the saw resting on the rollei 111, the wheel and its supporting har can yield vertically and accommodate themselves to the roll or belly o1 the saw. The pin 22, it will be observed, engages the spring, to compress the same when the bar moves downward, and :forms a stop limiting the upward movement o the bar. The notches l5 in the shank 12 present outwardly inclined upper walls and shoulders at the bottoms of the recesses, on which shoulders the ends of the dog 17 may rest, to firmly support the slide and roller.

In order that the wheel 14 may be supported at either side of the shank 12 and thus make the device reversible to either side ot the log, provision is made for turning the sleeve 13 on the shank, for which purpose the shank near the lower end is of reduced diameter and preferably made round as at 23, so that when the sleeve 13 is moved down to the portion 23, said sleeve may he turned to swing the saw supporting wheel to either side of the shank. In the ease of large logs, the kerl is started with the saw guide supported at the lower end of the shank below the notched portion, for which purpose the head or flange 24 is formed below the lower end ot the portion 23, and immediately adjacent the said head the shank has square or non-circular formation as at 25, to conform to the lower end of the bore of the sleeve whereby to support the latter resting against the fiange 24e.

lith my improved construction there are no parts liable to become broken, and moreover, the device may be readily and rconveniently adjusted to suit the work at hand.

Having thus described my invention, I,

shank having` a laterally projecting fasten-V ing member at its upper end, a sleeve slidable vertically on the shank, there being co-` acting means on the shank and sleeve to hold the latter at dierent elevations, the sleeve having vertically spaced lateral lugs at one side, in alinement with each other, a bar eX- tending through said lugs parallel with the shank and having limited movement vertically, a spiral spring on the bar between the lugs, yieldingly supporting the'bar, a pin passing transversely through the bar at the upper end of the spring, forming a stop limiting the'upward movement of the bar and serving to engage the spring when the bar moves downwardly, said bar having a lateral stud aXle, and a Saw supporting wheel on said axle. Y

In testimony vwhereof l have signed my 25. name to this specification in the presence of two subscribing witnesses.

l CHARLES DEvERELL.

- lWitnesses:

Y LILLIAN H. CANARIO,

k[losEPH GIRARD.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner .of Patents,

. Washington, D. C. 

